Core Graphic: OS includes an integrated stack of graphics technologies that provide the foundation for building engaging visual experiences. Specialized frameworks – which handle 2D, 3D and animation.
Core Data: Core Data is a framework Apple provides to developers that is described as a “schema-driven object graph management and persistence framework. The framework manages where data is stored, how it is stored, data caching, and memory management. It was ported to the iPhone from Mac OS X with the 3.0 iPhone SDK release.